Galaxy Zoo Talk

Images look different on skyserver

  • majortim by majortim

    I just checked a galaxy on skyserver, the silver colour of the original was replaced by amber, and the image was flipped. Why is that?


  • ElisabethB by ElisabethB moderator

    The image here is from the UKIDS Survey and it is an infrared image. The images on skyserver are in the optical. Don't know why they are flipped.

    More info here :


  • JeanTate by JeanTate in response to majortim's comment.

    and the image was flipped. Why is that?

    SDSS images have the same orientation: N to the top, E to the left. The orientation of UKIDSS images is not standardized; what you see is the orientation of the camera at the time it 'snapped the picture' (so to speak).

    "Amber" in an SDSS image, for a galaxy, usually means stars only, and stars which are fairly old ... many Main Sequence stars have evolved to the red giant phase, for example, and all the massive, bright, blue stars have long since died. This is, typically, the color of most galaxy bulges. This particular galaxy has streaks of pale yellow, even white, in the SDSS image; that usually signifies a somewhat younger population of stars (in a galaxy as close to us as this one).